铰刀的切削部与校正部的交接处倒圆(如图1所示),其效果如何,说法不一,目前尚是一个有争议的问题。下面谈谈我们的看法。在铰刀的切削部与校正部交接处倒圆,在该处可形成过渡刃,减小铰刀的主偏角φ,如图2所示。在走刀量S—定的条件下,减小切削厚度a,增加铰刀刀尖强度,改善刀尖散热状况。在铰刀、夹具和机床刚性较好的条件下,铰刀切削部与校正部交接处经过恰当的倒圆,铰孔表面光洁度会有一定的提高。 Reamer cutting department and the Department of Correction Department rounding (Figure 1), the effect of how, different opinions, is still a controversial issue. Let’s talk about our opinion At the intersection of the cutting part and the correction part of the reamer, rounding is made, where a transition edge can be formed to reduce the main angle of rotation φ of the reamer, as shown in FIG. 2. Under the conditions of the amount of cutting S-cut, reducing the cutting thickness a, increase the reamer tip strength, improve the blade tip cooling conditions. Reamer, jigs and machine tools under the conditions of better rigidity, Reamer cutting department and the Department of correction at the junction of the appropriate rounding, reaming surface finish will be improved.